665288683 has 2 divisors, whose sum is σ = 665288684. Its totient is φ = 665288682.

The previous prime is 665288671. The next prime is 665288707. The reversal of 665288683 is 386882566.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-665288683 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 665288683.

It is not a weakly prime, because it can be changed into another prime (665288653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332644341 + 332644342.

It is an arithmetic number, because the mean of its divisors is an integer number (332644342).

Almost surely, 2^665288683 is an apocalyptic number.

665288683 is a deficient number, since it is larger than the sum of its proper divisors (1).

665288683 is an equidigital number, since it uses as much as digits as its factorization.

665288683 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3317760, while the sum is 52.

The square root of 665288683 is about 25793.1906324130. The cubic root of 665288683 is about 872.9781597563.

The spelling of 665288683 in words is "six hundred sixty-five million, two hundred eighty-eight thousand, six hundred eighty-three".